I've got some cycles to work on CompositeTable and I've kicked that off
by applying all of the pending patches in Bugzilla. Those should all
either be released in a build or in HEAD. If you don't find your
favorite patch applied, please check the bug where it was submitted for
a reason.

The next step (after doing one more release with all of the current
fixes is to generally clean up the code. Over the past couple of years,
InternalCompositeTable has gotten way too complex. This will present an
opportunity to introduce more rigorous unit test that will be integrated
into the build.

For anyone interested in tracking progress, offering advice (or better
yet, patches), I've opened up bug #220281. Please CC yourself there to
stay up to date on this work.

Lastly, I'll be filing bugs to track new work we intend to do against
CompositeTable in the future. To stay up to date on this, you can
subscribe to the following RSS feed or query Bugzilla from time to time: